We have to admit, our first thought about the 140-year-old hot dog found in Coney Island was: hoax? Especially because the dog didn’t look much worse for the wear. But hey, News 12 Brooklyn seemed sure it was for real, as did CNN, and if they could find a 100-year-old bottle of scotch and a 2,000-year-old rotating banquet hall, why not a fossilized frankfurter? Well, the Post now reports that the Coney Island History Project faked the find in order to promote an exhibit displaying other remnants of the Feltman’s building. Well, doggone it.